static int kvm_msix_add(PCIDevice *dev, unsigned vector) { struct kvm_irq_routing_entry *entry = dev->msix_irq_entries + vector; int r; if (!kvm_has_gsi_routing(kvm_context)) { fprintf(stderr, "Warning: no MSI-X support found. " "At least kernel 2.6.30 is required for MSI-X support.\n" ); return -EOPNOTSUPP; } r = kvm_get_irq_route_gsi(kvm_context); if (r < 0) { fprintf(stderr, "%s: kvm_get_irq_route_gsi failed: %s\n", __func__, strerror(-r)); return r; } entry->gsi = r; kvm_msix_routing_entry(dev, vector, entry); r = kvm_add_routing_entry(kvm_context, entry); if (r < 0) { fprintf(stderr, "%s: kvm_add_routing_entry failed: %s\n", __func__, strerror(-r)); return r; } r = kvm_commit_irq_routes(kvm_context); if (r < 0) { fprintf(stderr, "%s: kvm_commit_irq_routes failed: %s\n", __func__, strerror(-r)); return r; } return 0; }
/* Initialize the MSI-X structures. Note: if MSI-X is supported, BAR size is * modified, it should be retrieved with msix_bar_size. */ int msix_init(struct PCIDevice *dev, unsigned short nentries, MemoryRegion *bar, unsigned bar_nr, unsigned bar_size) { int ret; /* Nothing to do if MSI is not supported by interrupt controller */ if (!msix_supported || (kvm_enabled() && kvm_irqchip_in_kernel() && !kvm_has_gsi_routing())) { return -ENOTSUP; } if (nentries > MSIX_MAX_ENTRIES) return -EINVAL; dev->msix_mask_notifier = NULL; dev->msix_entry_used = g_malloc0(MSIX_MAX_ENTRIES * sizeof *dev->msix_entry_used); dev->msix_table_page = g_malloc0(MSIX_PAGE_SIZE); msix_mask_all(dev, nentries); memory_region_init_io(&dev->msix_mmio, &msix_mmio_ops, dev, "msix", MSIX_PAGE_SIZE); dev->msix_entries_nr = nentries; ret = msix_add_config(dev, nentries, bar_nr, bar_size); if (ret) goto err_config; if (kvm_enabled() && kvm_irqchip_in_kernel()) { dev->msix_irq_entries = g_malloc(nentries * sizeof *dev->msix_irq_entries); } dev->cap_present |= QEMU_PCI_CAP_MSIX; msix_mmio_setup(dev, bar); return 0; err_config: dev->msix_entries_nr = 0; memory_region_destroy(&dev->msix_mmio); g_free(dev->msix_table_page); dev->msix_table_page = NULL; g_free(dev->msix_entry_used); dev->msix_entry_used = NULL; return ret; }
static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp) { GICv3State *s = KVM_ARM_GICV3(dev); KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s); Error *local_err = NULL; int i; DPRINTF("kvm_arm_gicv3_realize\n"); kgc->parent_realize(dev, &local_err); if (local_err) { error_propagate(errp, local_err); return; } if (s->security_extn) { error_setg(errp, "the in-kernel VGICv3 does not implement the " "security extensions"); return; } gicv3_init_irqs_and_mmio(s, kvm_arm_gicv3_set_irq, NULL); /* Block migration of a KVM GICv3 device: the API for saving and restoring * the state in the kernel is not yet finalised in the kernel or * implemented in QEMU. */ error_setg(&s->migration_blocker, "vGICv3 migration is not implemented"); migrate_add_blocker(s->migration_blocker, &local_err); if (local_err) { error_propagate(errp, local_err); error_free(s->migration_blocker); return; } /* Try to create the device via the device control API */ s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_V3, false); if (s->dev_fd < 0) { error_setg_errno(errp, -s->dev_fd, "error creating in-kernel VGIC"); return; } kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_NR_IRQS, 0, &s->num_irq, true); /* Tell the kernel to complete VGIC initialization now */ kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); kvm_arm_register_device(&s->iomem_dist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_V3_ADDR_TYPE_DIST, s->dev_fd); kvm_arm_register_device(&s->iomem_redist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd); if (kvm_has_gsi_routing()) { /* set up irq routing */ kvm_init_irq_routing(kvm_state); for (i = 0; i < s->num_irq - GIC_INTERNAL; ++i) { kvm_irqchip_add_irq_route(kvm_state, i, 0, i); } kvm_gsi_routing_allowed = true; kvm_irqchip_commit_routes(kvm_state); } }